Test piece frame for testing metal roof

The invention discloses a test piece frame for testing a metal roof. The test piece frame is convenient to use, which saves the test time and improves the equipment utilization rate and the detection efficiency. The test piece frame comprises a frame body (1), a plurality of purlin fixing racks (2), a plurality of pressing plates (3) and a plurality of purlins (5). The external dimension of the frame body (1) is matched with the dimension of the inner cavity of a test box body (10). The purlin fixing racks (2) and the pressing plates (3) are fixedly connected and are located on the side surface of the frame body (1). The two ends of the purlins (5) are respectively and fixedly connected with two purlin fixing racks (2) on the opposite side surfaces of the frame body (1). During detection, a detection test piece (8) is overlapped and fixed onto the frame body (1) and the purlins (5). The frame body (1), the purlins (5) and the detection test piece (8) are placed inside the test box body (10) and then are fixed